# CSIS

> English word · Proper noun · IPA /ˈsiː.sɪs/ · frequency rank #53,475

## Definitions
1. Acronym of Canadian Security Intelligence Service.
2. Acronym of Center for Strategic and International Studies.
3. Acronym of Centre for Strategic and International Studies.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/csis